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engines/saga2/rect.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * aint32 with this program; if not, write to the Free Software
+ *
+ *
+ * Based on the original sources
+ *   Faery Tale II -- The Halls of the Dead
+ *   (c) 1993-1996 The Wyrmkeep Entertainment Co.
+ */
+
+#include "saga2/saga2.h"
+#include "saga2/rect.h"
+
+namespace Saga2 {
+
+void Point16::load(Common::SeekableReadStream *stream) {
+	x = stream->readSint16LE();
+	y = stream->readSint16LE();
+}
+
+void Point16::write(Common::MemoryWriteStreamDynamic *out) {
+	out->writeSint16LE(x);
+	out->writeSint16LE(y);
+}
+
+void Rect16::read(Common::InSaveFile *in) {
+	x = in->readSint16LE();
+	y = in->readSint16LE();
+	width = in->readSint16LE();
+	height = in->readSint16LE();
+}
+
+void Rect16::write(Common::MemoryWriteStreamDynamic *out) {
+	out->writeSint16LE(x);
+	out->writeSint16LE(y);
+	out->writeSint16LE(width);
+	out->writeSint16LE(height);
+}
+
+Rect16 bound(const Rect16 a, const Rect16 b) {
+	int16               x1, x2, y1, y2;
+
+	x1 = MIN(a.x, b.x);
+	x2 = MAX(a.x + a.width, b.x + b.width) - x1;
+	y1 = MIN(a.y, b.y);
+	y2 = MAX(a.y + a.height, b.y + b.height) - y1;
+
+	return Rect16(x1, y1, x2, y2);
+}
+
+void Rect16::expand(int16 dx, int16 dy) {
+	x -= dx;
+	width += dx + dx;
+	y -= dy;
+	height += dy + dy;
+}
+
+void Rect16::expand(int16 left, int16 top, int16 right, int16 bottom) {
+	x -= left;
+	width  += left + right;
+	y -= top;
+	height += top + bottom;
+}
+
+Rect16 intersect(const Rect16 a, const Rect16 b) {
+	int16               x1, width, y1, height;
+
+	x1      = MAX(a.x, b.x);
+	width   = MIN(a.x + a.width, b.x + b.width) - x1;
+	y1      = MAX(a.y, b.y);
+	height  = MIN(a.y + a.height, b.y + b.height) - y1;
+
+	if ((width <= 0) || (height <= 0))
+		return Rect16(0, 0, 0, 0);
+	else
+		return Rect16(x1, y1, width, height);
+}
+
+void Rect16::normalize() {
+	if (width < 0) {
+		x += width;
+		width = -width;
+	}
+	if (height < 0) {
+		y += height;
+		height = - height;
+	}
+}
+
+bool Rect16::overlap(const Rect16 &r) const {
+	return (r.x < x + width  && x < r.x + r.width
+	        && r.y < y + height && y < r.y + r.height);
+}
+
+} // end if namespace Saga2